import type { LanguageModelUsage } from 'ai';
import type { TurnUsageSnapshot } from '../../types/channel.js';
export declare function addTurnUsage(current: TurnUsageSnapshot | undefined, usage: LanguageModelUsage): TurnUsageSnapshot;
/** Best-effort model id for `llm:` span names; stubs without `modelId` report `unknown`. */
export declare function languageModelId(model: {
    modelId?: unknown;
} | unknown): string;